<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>媒体查询练习2</title>
    <link rel="stylesheet" href="media2.css">
</head>
<body>
    <div class="example">
        <p>我会在整个页面尺寸小于600像素后隐藏。</p>
    </div>
</body>
</html>